Abrasive.



C. E. GASEBOLT.

ABRASIVE.

APPLICATION FILED MAE. 9, 1912.

1,039,487. Patented Sept. 24, 1912.

W I I J Invdztor,

ChazlgslZ M60916,

UNITED STATES PATENT OFFICE.

CHARLES H. CASEBOLT, OF ST. LOUIS, MISSOURI, ASSIGNOR OF FIFTY-FIVEONE-HUN- DREDTHS TO WILLIAMS PATENT CRUSHER & PULVERIZER COMPANY, OF ST.LOUIS,

MISSOURI, A CORPORATION OF MISSOURI.

ABRASIVE.

Specification of Letters Patent.

Patented Sept. 24, 1912.

Application filed March 9, 1912. Serial No. 682,818.

T 0 all whom 2'2- may concern:

Be it known that 1, CHARLES H. CAsEBoL'r,

' a citizen of the United States, residing at St. Louis, Missouri, haveinvented a certain new and useful Improvement in Abrasives, of which thefollowing is a full, clear, and exact description, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, forming part ofthis specification, in which- Figure l showsone of the forms 'of myinvention as applied to the outside of a cylindrical roll. Fig. 2 is asimilar form of my invention applied to the inside of a cylindricalshell. Fig. 3 is a cross section through the preferred form of myinvention. Fig. 4c is a perspective of a fragment of the preferred formshowing the relation of the abrasive elements to one another and to theretaining materials. Fig. 5 is a vertical cross section through amodified form. Fig. 6 is a modified form applied to a grinding wheel orattrition disk. Fig. 7 is my invention applied to the disks ofanattrition' mill.

My invention relates broadly to abrasives and specifically to amanufactured abrasive material adapted for use in scouring-grind ing.delinting and clipping.

An understanding of the following de-- scription may be had by referenceto'the' accompanying drawings.

The principal object of my invention is to provide an abrasive whichwill be selfsharpenii'ig.

Another purpose of my invention is to provide an abrasive material whichmay be applied to curved or irregular surfaces and when shaped toconform thereto may be made rigid so as to preserve that form.

A further purpose of my invention is to produce an abrasive which may beformed with abrading elements therein of any desired degree of hardnessor in any desired number.

As may be seen from the illustrations, my invention contemplates the useof a number of metallic abrading elements 1, which are set in anydesired arrangement in a firm fabric 2, which fabric is of sufficientstrength to hold the abrading elements firmly therein and of pliabilitysuificient to permit its being shaped to conform to curved or irregularsurfaces, as is illustrated in Figs. 1 and 3, wherein the strips 3 areshown applied to the curved surfaces of the cylindrical members 4:. Whenthus applied, the strips may beheld in place by suitable securing meansin the form of wires 5 and held together by means of suitably disposedtransverse wires or reinforcing members 6. These securing andreinforcing members are laid close to the fabric 2 below the upper endsof the abrading elements 1. After being thus applied, the intersticesbetween the several abrading elements 1 are filled with a suitablecement metal, crystalline material, or plaster 7 which is allowed to setand which when set forms a rigid structure which holds the abrasive inthe form to which it has been shaped. This cement or plaster 7, while ofsufiicient hardness or rigidity to give strength and form to theabrasive, is of a less degree of hardness than are the abradingelements 1. The purpose of this is that when the abrasive is in use andas the abrading elements are gradually worn down at their outer ends,the ,cement between them will be worn down faster, and hence theabrading elements 1 -will always projectbeyond the surface of the cement7. By this means the abrasive surface is made self-sharpening as thewearing action upon the surface always keeps the abrading pointsprojected beyond the general surface of the material.

In the forms illustrated in Figs. 1, 2, 3, and 4., the fabric carryingthe abradin elements 1 is shown as ordinary card clot ing. As thismaterial may be obtained having any desired arrangement or number perinch. of elements 1, and having said elements 1 formed of material ofany degree of hardness, it is obvious that the degree of hardness androughness of my abrasive may be positively and accurately determined.

In the forms shown in Figs. 5 and 6, the foundation fabric 2 consists ofcontiguously disposed sheets of wire mesh and the abrading elements 1are inserted and held in the openingsbetween the strands. It will beseen that this form gives a very firm, though flexible foundation whichmay be cut into any shape suitable for application to grinding disks orattrition disks. When designed to be applied to disks in this fashion,some v of the elements 1 may be made longer than the others as'isillustrated at 8, the extended reversing the direction of movement ofthe abrading surface, whereby when the working edges on one side of theabrading elements 1 have become worn, the opposite edges may be broughtinto use. As a further means of preserving. sharp working edges on theelements 1, it is often desirable to reduce or flatten the portions ofthe elements 1 above the fabric 2, whereb a sharp edge is secured on theworking si es of the elements.

My abrasive may be advantageously used .on delinting rolls in which aworking surface of constant sharpness must be maintained, or inattrition mills in which the abrading surface dullsrapidly and isdifli-.

cult to resharpen.

WVhile I have disclosed butv two forms of my invention, it is obviousthat many modifications thereof may be made and I do not wish myinvention 'to be considered as limited to the specific forms shown.

What I claim is:

'1. An abrasive comprising a pliable meshed foundation member, aplurality of abrasive elements secured in saidfoundation, and a plasticfiller surrounding the said elements and filling the fabric.

2. An abrasive comprising a pliable fabric,

abrasive elements secured in said fabric,

connecting said strips, and plastic material surrounding said abradingelements and said reinforcing elements.

4. An abrading surface comprising a meshed fabric' foundation, abradingelements set in said foundation, and ri id material covering and fillingsaid foundation.

5. An abrasive comprising a pliable meshed fabric, abrading elements setin said fabric, and plastic material applied to said fabric. V

6. An abrasive comprising a meshed fabric foundation, a plurality ofabrasive elements secured in said foundation, and a filler composed ofcrystalline material surrounding portions of said abrasive elements andfilling the fabric.

7. An abrasive comprising a pliable fabric, abrasive elements secured insaid fabric, and a metallic filler of less degree of hardness than saidelements surrounding said elements and'impregnating said fabric.

In testimony whereof I hereunto affix my signature in the presence oftwowitnesses,

this 27th day of February, 1912. CHARLES H. CASEBOLT.

Witnesses:

M. P. SMITH, O. S. BUTLER.

